Endurance: A Year in Space, A Lifetime of Discovery – Review by Akshay Kumar

Scott Kelly is a previous military pilot and aircraft tester, a designer, A veteran of four space flights, Kelly ordered the International Space Station (ISS) on three undertakings and was an individual from the yearlong mission to the ISS. In October 2015, he set the record for the aggregate collected number of days spent in space, the single longest space mission by an American space traveler.

His indistinguishable twin sibling is Mark Kelly, additionally, a previous space explorer. The veteran of four space flights and the American record holder for successive days spent in space, Scott Kelly has encountered things not very many have. Presently, he takes us inside a circle absolutely unfriendly to human life.

He portrays exploring the outrageous test of long haul spaceflight, both existential and worn-out: the staggering impacts on the body; the seclusion from everybody he cherishes and the solaces of Earth; the weights of steady close dwelling together; the cataclysmic dangers of depressurization or crashing into space garbage, the still all the more eerie risk of being not able to help should disaster strike at home- – a horrifying circumstance Kelly confronted when, on another mission, his twin sibling’s significant other, Gabrielle Giffords, was shot while regardless he had two months in space.

Kelly’s mankind, empathy, silliness, and enthusiasm resound all through, as he reviews his harsh and-tumble New Jersey adolescence and the energetic motivation that started his shocking profession, and as he clarifies his conviction that Mars will be the following, at last, difficult advance in American spaceflight. A characteristic storyteller and current saint, Kelly has a message of seeking the future that will motivate for ages to come. Here, in his own story, we see the triumph of the human creative energy, the quality of the human will, and the endless ponder of the cosmic system.

About Kelly: Kelly’s first spaceflight was as pilot of Space Shuttle Discovery, amid STS-103 in December 1999. This was the third overhauling mission to the Hubble Space Telescope and went on for just shy of eight days. Kelly’s second spaceflight was as mission administrator of STS-118, a 12-day Space Shuttle mission to the International Space Station in August 2007.

Kelly’s third spaceflight was as leader of Expedition 26 on the ISS. He arrived 9 October 2010, on a Russian Soyuz spacecraft, during Expedition 25, and filled in as a flight build until the point when it finished. He assumed control summons of the station on 25 November 2010, toward the begin of Expedition 26 which started formally when the rocket Soyuz TMA-19 undocked, conveying the past leader of the station, Douglas H. Wheelock.Expedition 26 finished on 16 March 2011 with the flight of Soyuz TMA-01M. This was Kelly’s initially long-length spaceflight.

© Akshay Kumar [2017]

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Fabric of Space-Time [astrophysics] Part – 2

What is the best gift of modern physics?

Modern Physics has given the most valuable asset to the world of science. Principles that are used to describe our nature are limited. many laws are being stated and few of them succeed in proving them theoretically and sometimes experimentally, few are proved wrong.

One such curious concept read over decades, it’s also a mind-boggling concept. It is space – time. let’s see what I can say about it.

Do you know about space?

Space which is 3-Dimensional or multidimensional quantity along with planes in their curves [space-time fabric], entities will be much complex. Few people have believed that double slit experiment of physics leads to the wave nature of light, So usual science and its thoughts transformed then.

Space is the boundless three-dimensional extent in which objects and events have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime.

space is everything in the universe beyond the top of the Earth’s atmosphere – the Moon, where the GPS satellites orbit, Mars, other stars, the Milky Way, black holes, and distant quasars. this statement defines space, which is rather part of the universe, not to consider as a physical quantity.

What about time? Good time, bad time

Time is a very fascinating thing in this universe, is that time what that clock shows? or time is beyond our imagination? research says, In the beginning of time there was a singularity, where our time started. but the concept of time breaks the laws of physics. many contradictory statements are noticed to say whether the time is absolute or time is relative. but anyway modern physics and its triumph in theoretical research declared time as a non-absolute quantity.

Time and space is a continuum, we don’t have proper evidence to say time is universal, In other words, since there is no universal time. we have no time, which we can synchronize clocks. In this real world, what we also call a macroscopic world, here it’s very difficult to notice.

but man made things like space vehicles and satellites which travel in space are synchronized. For GPS to work we must make sure those are adjusted to similar bending of space time to coordinates of systems present in the earth.

to be continued,



Fabric of space-time


© Akshay Kumar [2017]

You can Follow Me at https://twitter.com/akshayphysics

Follow My Page: https://www.facebook.com/melodiesphysics/

Previous article, https://akshaykumarphysics.wordpress.com/2017/08/16/stellar-spectrum-importance-ssi-astrophysics-part-1/

Age of universe



Age of universe

cosmology is the science of universe and large scale structure of it.it begin in studies extensively by the begining of the 20th centuary by Albert einstien.

the general theory of relativity which had sufficient ideology to construct mathematical models of the universe.

and it given strong base by Edwin hubble’s own measurements of hus constant.

The age ofuniverse is approximatly about 13 billion years.

it was in  the midst of  this chaos that the hubble space telescope was launched 1990.the hubble’s space telescope was on the high side implying a rather young universe,also depending on what theoretical mode is accepted.Scientists say the universe could be just 8 billion years old if the hubble constant is precisely 80.